Arch structure.



No. 818,386. PATENTED APR. 1'7, 1906. D. B. LUIEN.

ARCH STRUCTURE.

APPLICATION FILED 1111125, 1904.

so strength and 4.5 stresses tlins incliiced.

,55 the compressive stresses.

DANZEL LUTEN, F234.

no. 818,386. Original spplicetion'filed ld'ey 1'? 1902, Serial Tic, 107,812.

To all whom it "may concern.-

Be it known that I, DANIEL Lumen, citizen of the United States, residing; "st in: disnepolis, in the county of itzl erion end. State 5c? Indians, have invented certein new useful Improvements in Arch Structures, of

t liicli the following is e :l'iiil, clear, concise,

endexitct description, reference being lied. to the accompanying drawings, tornomg e This invention relates to improvements in srclies of that class whichv are designed to serve as vieclucts across streams, roadways, ravines, &c., encl wnich are commonly cone {gist-11101566. of concrete, stone, brick, cement,

225 rcpt or break the arch at various pcints, to

economy .c. pest 11 es compresent in gether with greater cost of materials and constiiictic pared with arches of this class at use.

30 To these and other minor ends my ll'lliallxtion consists in arc structure litt'tillg the peculiarities of construction and sdventeges in use more p erticuloily hereinafter describ ecl, end pointed out in the clainwi The"present e plicetion; co'nstitutese di vision of an epplicationiiled by me on the 17th days? May, 1902, Series No, 107,812.

My invention relates chiefly to arches of concrete or other masonry which are rein- .0 forced. with steel. In such arches economy of material may he seemed by so proportion ing the arch that certein portions "will be in tension. umiei ep plieil loscle'ensl relying; upon reinforcing lJBIlSlOZl-FOtlS tcm'esist the tensile lit-the pi A steel is most fi'equentlfi employed "forcement for concrete iii arches and snelogous structures; but at present prices of tllese IQEHlCFlttlS steel is more economical 50 than concrete in tension, but not in comression. For maximum economy, theretore, the steel reinlorcement should be de signed as nearly as possible to resist the tensilo stresses, relying upon the concrete to resist lit known t Wilfin one Mtge of an emit-rib is in tensi Falpecificetien o'f'ILetters Ffotent.

Divideel and this application tiled July 25,1ll0 Serial Il a. B y/.985.

edge Will Petentetfii iii 17, 1906.

any region the erijncent regions of the senie V be in cos p essiozi, While on the iininetiiete f opposite ecige c'lf"tl1e iii) the reverse condi in crclei'fitliesi, to pass through gici't ons in rods should o to side oi the rie crossing the rib {Joints of change of stress. A reinforcingeal wiile not necesserilyel-t WQLYS in tension o? tension throughoutflc will sppi'oximetes conditions. Since the/f stresses in en efcn e mey'loe to a cer{- tein extent mess use since the loecls may "very in their s cgiplicetion, tee

soints of loeetion oi 1n the arch region ere not always the same; but their location mcy' be varied to suit the oei'ticuler form or clie'iectei otthe rib end. emtum is that the given. loedi 1. thefregions 7 properly "l. l on ct that series ollrods having tl eii points of crossing; lscecl with tespect to n 1 M2 tile I'Gtlfl s1 v.

sirle to same of by combining gee come upon Venous enter si -0=lfl in connection. with. tile rent forms of are shown in these s O eso ccinpsnying d'sexvvings illustrative of my in vention, where1nare ctoss sectionel 9e these reinforcingqocie 7cupon 'ebutmentsil embedded be oW-end on c1 *1 i icle of "he streem, (indicetegi scvcml lines therein. shown as extend side to side of the fill e t various p0 of these rods ere shown. as occupying positions ion st the crown of the arch and high at the hennclies, but crossing; the arch at ve- 105 The rods no are 4 he crown pmc'b'icvhy Wn is spread fartiu neat of the reds 15 re- 15% vwtical loads over "1 womd tend to muse Lie extent indicated. The

ends of the 50,-- .1 into the abutments inning of 129 aim o the body of the .ants. As the thrust w the a bra an.

of the ena'i h J3 atbm' 0011* :111 that the he haunches case he :11- i 0?." 0 the? tension mem- L wn and low at man; baing; win). the arch i7, it wi'il'be seen that, flares series 13, 19, 1 g1: at the crown of hue imvarying distances haunches, cross Qiflei'mnfi pointm, and all of them 7 mioV-Jn the im'u;

50mm V.

applied in H 125k pi ne/rem 91' infovi (led be L w -30 n. strut mm keep O'VQLSU gnh t to better Sta-m; bje wed in sus h in t Fig. 4 s nihu' an'mlge nentof 'teijlsiu; t

altar .cr, 541 as L 4 conditions 0 loading. Such a- :31

.reyres ulted in Fig. 5 wherein 36 mmlway 7 through series of verumns .28, -oomd a intzgrvzds upon the u wrfiacc of the rib. To reinforce the 191 561 1 7 is five represented three series of embedded tmfimr-rods, of Whih onn series 29 are dis-- 1x5 posed. dang the intmdcs at the crown "for &- w: mes, than creasing therib and 0m:- ihs rest of the way (mm: 210 the 0x 'iiw- 015 3-0 of anouher 30:; Ha the m mados for mrying 11110119 '20 then (my 41;; the rib :mi'mlm {he 1.1221121. of 'h; MU :Lrmthsw marina 3? M1 bra-k and forth, (SF'OSbi awarai points. This W saving o t 125 ainht b ansaiu strains in tho direction n1 its 1? but bonds the m; mm! 0% {he or securely crosswlse, gii'cutunlly g in? any tendency to. s iitting, which might be reduced by excessive shearing oi tensiie sti'eizos orbyieok of homogenei-tyof materiel.

a i toe sro'wi'i low at the haunches, substsetieiiy as de SCI'iDQd. I

An ez'oil having a plurality of tension members embedded therein; said members,

passing alternately across the rib and. being; high at the crown and low at the heuncnes, em 1. passing across the rib at diiie'rent pomt iongitmiineiiy from the others, substan tiaiiy as described.

4'. A.\ r hh '1"o't r bx 1. W aun L-HSXQA meow em em therein and passing alternately lli), some of saw members being low at the crown anti high zit the heunohee and others being high at the crown and iow t haunohes, substantially as described.

An arch having two classes of tension 1 memoezs embedded. therein and passing ol- "teinotely across the rib, one does being 10W et the crown and high at the heunches, the

other high at the crown and low at the imonehes the several members of eeoh class crossing the ereh. st.iongitudineiiy-difierent points More the others, substentieiiy es described. e

6. An arch having tension members embedded therein, some of said members bein low at the crown and high at the haunches anti others hi h at the crown and low at the y b r iieuncnes, e pavement extending across the of the stream between ebutments or side wslie, end ties embedded in said pavement and extending from abutment to abutment, substantisliy as described.

7. A11 arch having embedded therein rods, bars or other tension members in two or more series; following one face of the arch-rib, thence across end following the other face of the rib, the points of crossing for the differ ent series being engulerly '01 laterally dis placed with respect to each other, subset-aw 'tielly as described.

Signed by me at Indianapolis, county of.

Marion, Stete of Indians, in the presence of two Witnesses.

DANIEL B. LUTEN. Witnesses B. C. REINBART, A. 6. BROWN. 

